If you go to the Underworld and enter in one of the games, then quit immediately, you will come out of the game with a full drive gauge.
Also, if you go to the world map while currently in a form, you will land with a full drive gauge as well.
Great tip for leveling up your forms.
(supplied by: darkish_raven)
You may have noticed this, but I think it's cool. Some names were recycled to make the names of 3 of the characters. There may be more!
Roxas: Switch "s" and "r", switch "r" and "a", remove "x"
Soxar -> Soxra -> Sora
Xemnas: Move "a" to 1st slot, "n" to 2nd, "s" to 3rd, take out "x"
Axemns -> Anxems -> Ansxem -> Ansem
Yin Sed: swap "d" & "y", then "n" & "s", remove space Din Sey -> Dis Ney -> Disney
(supplied by: revenge619)