Successfully complete the game. Once done, wait three weeks. After the third week you will get a visit from Mr. Karnab. He informs you that new passageways have opened in the ruins that you have. Go to adventure and press Right or Left to switch from normal adventure to Adventure +. Adventure + is much harder then normal adventure. All the wild monsters are "S" rank, and the ruins have many levels (about 10). Of course, the items are much better in Adventure +.
Successfully complete the game and save it once the credits are done. Then, reload your game. Two weeks after you completed the game, a feather from Suzaku is left behind. He asks you to train a Pheonix, and tells you that the feather allows you to revive a Pheonix from a disc. From this point on you can revive Pheonix monsters.
If you have a new monster that has trouble in adventures, use this trick to get it leveled up faster. Go to an adventure, it does not matter where. Make sure you have a powerful monster in your party. Battle an enemy, and instead of KOing them with the powerful monster, weaken them so that they only have a sliver of life renamining. Then, switch with your weaker monster and allow it to finish the monster. The experience will be rewarded mostly to the weaker monster. This is an easy way to give it experience and allow it to gain new attacks and abilities.
A very easy way to go through the storyline quickly is to get a monster dedicated to Power and Accuracy, Train it in Power and Accuracy mostly, but have all its other stats at level 10. The power and accuracy easily raise to level 20 to 30. Most monsters through E, D, C, B, and A classes will not be able to dodge your attacks, and they will be KOed in one to two moves. This works well against Bosses and in dungeons, since they attack rarely which leaves them wide open for quick attacks that will do devastating damage. Having 700 Power and Accuracy makes the final Boss very easy to defeat in both forms. Note: Monsters such as Bleakons are perfect for this, since their Power and Accuracy are raised quickly and easily.
If you happen to accidentally get a monster you do not want (usually by pressing X too fast when regenerating monsters), you can get rid of it for good. When you go to the association and select "Retire", the lady will ask you if you want to freeze it. Tell her "No". She will then ask if you want to retire it. Tell her "Yes". It will not use up a spot in your freezer and you will get rid of an unwanted monster.
When you fill up the traits on your monster's data you can get rid of unwanted traits like Genius. To do so, level up until you get another trait. You will be asked if you want to delete a trait to make room for a new one.
It seems that a monster that you use directly from a CD or DVD has better stats than one that you use from the book.
There are certain monsters you cannot make through combinations and must get through discs. They usually have a unique look, relating to the disc they have been spawned from:
|Ambush||Henger/???||DVD||AI: Artificial Intelligence|
|ChaosDurahan||Durahan/???||DVD||Lord Of The Rings: The Two Towers (Special Features Disc)|
|ComedyKoro||KoroPendora/???||DVD||Simpsons Season 1 (Disc 1)|
|Devi||Mocchi/???||PlayStation game||Monster Rancher 2|
|Dino||Zuum/???||PlayStation game||Monster Rancher 1|
|Dolaine||Antlan/???||PlayStation2 game||Kingdom Hearts|
|Drividillo||Madillo/???||PlayStation2 game||Midnight Club 2|
|Drividillo||Madillo/???||PlayStation2 game||Gran Turismo 3|
|FakeGraffiti||Zan/???||DVD||The Simpsons Season 2 (Disc 1)|
|Goku||Garu/???||PlayStation2 game||Dragon Ball Z Budokai|
|GuanYuDuck||Ducken/???||PlayStation2 game||Grand Theft Auto 3|
|Guanyuduck||Ducken/???||PlayStation2 game||Grand Theft Auto Vice City|
|HipMew||Mew/???||DVD||Cowboy Bebop: The Movie|
|Joker||Joker/Joker||CD||Silent Hill 3 soundtrack|
|Joker||Joker/Joker||DVD||Terminator 3: Rise Of The Machines|
|Kagemusha||Duran/???||PlayStation2 game||Omnimusha 2|
|Miku||Pixe/???||PlayStation2 game||Fatal Frame|
|MushTan||Plant/???||PC game||Most computer games|
|Nightsickle||Ripper/???||PlayStation2 game||Final Fantasy 10|
|Kirin||Zumm/???||PlayStation2 game||Dynasty Warriors 4|
|PandiBaku||Baku/???||DVD||Shrek (Disc 1)|
|Phoenix||DVD||Dragon Ball Z Majun Buu- Defiance|
|White Mocchi||Mocchi/???||DVD||Ice Age|