Successfully complete the game with Sora the first time through. After that, when you load a new game you will get an option for Reverse Rebirth mode, where you will control Riku.
Successfully complete the game with Sora the first time through to unlock Link mode.
Successfully complete the game in Reverse Rebirth mode to have Sora's Ultma Weapons available for purchase in Moogle Shops.
Lead Pooh out of the 100 Acre Wood to get the Bambi summon card.
Open the Key Of Rewards door in Agrabah to get the Blazing Donald Skill card.
Defeat Hades to get the Cloud summon card.
Open the Key Of Rewards door in the Coliseum to get the Diamond Dust card.
Successfully complete the Monstro level to get the Dumbo summon card.
Defeat Jafar to get the Genie summon card.
Open the Key Of Rewards door in Halloween Town to get the Gravity Raid Skill card.
Open the Key Of Rewards door in Traverse Town to get the Lionheart card.
Open the Key Of Rewards door in the Coliseum to get the Metal Chocobo card.
Use the Golden Bar card to open a door. The Mushu summon card will randomly appear behind one of the doors. Alternately, open the Key Of Rewards door in Hollow Bastion to get the Mushu summon card.
Open the Key Of Rewards door in Hollow Bastion or the Coliseum to get the One-Winged Angel card.
Defeat Guard Armor to get the Simba summon card. Note: When using the Simba summon card, enemies will flee to behind Simba so that they will not get hurt. Use Simba at the edge of the battle screen, and you have a high chance to hit every enemy there.
Open the Key Of Rewards door in Traverse Town to get the Spellbinder card.
Open the Key Of Rewards door in Wonderland to get the Stop Raid Skill card.
Open the Key Of Rewards door in Neverland to get the Thunder Raid Skill card.
Defeat Captain Hook to get the Tinkerbell summon card.
Open the Key Of Rewards door in Monstro to get the Water Splash Skill card.
To combine cards, press the L + R. The maximum you can combine is three. When three cards are combined, press L + R again to activate the cards.
When adding cards to your deck, if you choose a card (for example, a card value of 0 or 9), then exit the screen and go back, you may choose the same card (when otherwise that card becomes locked). If you repeat the process you can build a deck with all 0's, 9's, or a combination of strong attack, magic and Boss cards.
Combine magic spell cards by pressing L + R during battle. To cast level 2 magic spells, combine two of the same type of cards. The number does not matter. For example, 2 x Fire = Fira, 2 x Blizzard = Blizzara, 2 x Thunder = Thundara, 2 x Cure = Cura. To cast level 3 magic spells, combine three of the same type of cards. The number does not matter. For example, 3 x Fire = Firaga, 3 x Blizzard = Blizzaga, 3 x Thunder = Thundaga, 3 x Cure = Curaga.
Combining Cloud's magic spell cards by pressing L + R during battle. In order to use Cross-Slash, you must combine 2 x Cloud magic cards.
Combine Cloud magic spell cards by pressing L + R during battle. In order to use Omnislash, you must combine 3 x Cloud magic cards.
When you receive three Goofy cards, combine them and activate them to summon Goofy. Goofy will then start spinning around you. To take advantage of this, walk near you opponent close enough so that Goofy can attack them.
You need Mega-Ether + Mega-Elixir + any item card. To get Mega-Elixir, go to Destiny Island. It is in the Key Of Rewards room.
You need Mushu + Fire + Fire cards. To get Mushu, go to Hollow Bastion. It is in the Key Of Rewards room.
After defeating Ansem in Reverse Rebirth mode, you will see some pictures of a man in a white outfit, also known as the mysterious "Dual Wielder" seen in the Kingdom Hearts "Special Secret" Trailer. It is also rumored that you can play as the Dual Wielder in Kingdom Hearts 2.
Successfully complete the game with both Riku and Sora to get Ansem, Ultima Weapon, diamond Dust, One Winged Angel, and Lexaeus cards. Then, go to Castle Oblivion and use either Calm Bounty or False Bounty to get those cards.
Enter a room with barrels and defeat all the Heartless. Then, smash the barrels. One of three things will happen. Green spheres (HP) will appear; red spheres (Moogle Points) will appear; or it will turn into a Barrel Spider. Collect the spheres then leave the room. Immediately reenter the room and repeat. If it turns into a Barrel Spider, run away. Note: If you defeat the last Barrel Spider in a battle and it does not explode, you will get the Barrel Spider card. Additionally, the best place to get Moogle Points is Traverse Town.
In order to do this, fill Sora's deck with nothing but ones. Then, put a Powerwild card in the deck and go to battle. Activate the Powerwild, then the ones will become nines. Note: The Powerwild card to can be obtained at the Coliseum. If you use it a lot to battle, the ones will turn to a three.
You can still hit doors after you use cards to open them. Use different cards to get items, battles, etc.
During dialogue sequences that you have already viewed, hold Start until the game skips them. Note: This cannot be done for the animated intermission sequences.
While playing the game, press Select + Start + A + B.
After you complete Reverse Rebirth mode and Riku is walking down the roads and reaches the split, he will talk to DIZ. When he chooses his road, DIZ will say "twilit" instead of "twilight".
In order to defeat him you must have full HP, 15 AP, and 60 DP. When you are battling him, press Select and choose "Parasite Cage". Destroy his Sleight Bind because you will not see what sleight he is going to use. After that, card break him until you are in Dark mode. Then, activate Malifecant Dragon to go into Overdrive because it does more damage. When you do not have her anymore, activate Jafar so that Ansem will not cardbreak you. Finally, do not use your sleights. Normal attacks are better because Ansem will cardbreak it, or just use Guard with his Heartless Guardian. You must stock up on Mickey cards so that you can restore HP, or use Ogie Boogie so that he can restore your HP.
When fighting Captain Hook, never use Thunder, Thundara, or Thundaga. It is a waste, as thunder does not affect him.
To defeat Marluxia you must have maximum health and 820 card power. When that is done, put three or four cure cards. You then have to destroy the two swords. Do not worry -- he will not pay attention to them. Finally, cardbreak him. You will then see the lock on him; then attack. Note: You cannot attack him until you cardbreak him. You can tell you can attack by when the lock shows on him.
To defeat him is to use attack cards. Magic and Summon spells only take away 1 HP, but attack cards do some real damage.
When Oogie throws out three die, hit one of them to make one of the three gates he is in to stop rotating. Do this three times. You cannot hurt him until all three gates are down.
If your having trouble beating your Riku Replacia in Reverse Rebirth mode, use the following trick. Stock your three Nines cards but do not use them. Wait for him to use the enemy card that gives him Slight Lock. Use Darkside to copy it. Go Dark and use the three Nines to do Dark Aura, which will take an entire health bar off. Either attack him or immediately reload. Because you have Slight Lock, you will still have all three Nine cards instead of losing the first one as usual. Do Dark Aura again. After he reaches one health bar, he becomes more defensive and uses a lot of 0 cards. You may not be able to do Dark Aura a third time. However, you can wait until he uses all his cards and has to reload. Then, finish it with Dark Aura or just pummel him into submission. Additionally, use the following trick to defeat Riku with Sora the third time. By this time you should have Sora at level 60 to 70 with 0, 8,and 9 cards in your deck. For this battle, take out all your 0 cards; Riku will card break them easily. Your heath should be around 500 and your CP at 900. Fill your deck with about twenty attack cards, three summoning cards, two item cards, and ten magic cards. Have a group of Cures in your magic cards to cast Curaga. If desired, put in some enemy cards however Riku is so fast that it will only be a waste of heath. His attacks are very quick and powerful, but his sleights are the best. Dark Aura is his strongest, doing severe damage, is continuos, and is almost impossible to dodge. However, if you have a sleight available when he uses it, just counter with sleight. Even with strong attack cards, this will be difficult. His Dark Firaga attack is easy to dodge; just walk behind him when he fires it. Do not waste your cures. You will need them when you have two of his three health bars down.
Have a group of Keyblades or any related weapons and no summons except for Cloud. When you are trying to get out of Monstro, use up the Keyblades and charge. Keep doing this until you get the bar full.