I want a fighting game!!! Not where you walk around caves with a Aisha-flame-thrower and blow up Mutant Tiki Man Zombies... I mean like a bloodless mortal combat game!
You could choose your neopet you want to fight as *certian ones with certain powers* and each could jump walk around, block, do a ranged attack, and a close attack...
So maybe there would be a scorchio who could breath fire and whip its tail.
Some could have battledome weapons... like a kacheek whos close attack is a Kacheek Sword and ranged is a Kacheek Pebble Lobber.
And there could be special things drop in here and there for powerups, healing, or advantages... like petpets, or healing potions or something....
Like a REAL battledome fight, and you could fight battledome opponents with your keyboard

SSB:M - Neopets style. Unfortunately, I think SSB:M would still beat it by far (had a hilarious typo here, I'll let you figure out what it was) . But still, I'd probably play it quite a bit. (idea - make it so that you have to be 14 and over to play)