I think Genie and Simba (KH both) were the best summons, they could simply obliterate lots of enemies by using some of Sora's MP and they made all that beautiful show full of color and light. I simply love the amazingly eccentric way Genie casted all that magic XD, and Simba's roar was awesome!! The reason I think KHII summons suck is that they consume the Drive gauge, I mean you can cause much more havoc while using ANY of the forms than with Chicken Little, Stich or Genie. Peter Pan is actually pretty good, but still it's not pleasant to notice that your Drive gauge has decreased dramatically¬¬U (Besides I tend to call forth the wrong summon ^^U, so I want to summon Peter Pan f.e. and I wind up summoning Stitch ¬¬U)