Well, I'm glad Heracross is in there, but there are a whole bunch I know I'm gonna miss:
1) Definitely Eevee, or more accurately, Flareon. Its Attack and Special Attack were unbelievable, plus I love Fire Pokémon.
2) Another Fire type, Cyndaquil... and while I'm at it,
3, 4, and 5) Charmander, Charmeleon, and Charizard... old favorites (before Heracross ).
6) The Dragons (all of them, Dra- guys and Kingdra). I dunno... the new Dragons are *okay*, I guess....
All in all, I'm gonna miss the variation I got back in the day, when all of them were either running around in Kanto and Johto, or at least I could trade for them.