Rouge's dash attack is sex. But I never liked her jumping mechanic.
Sonic and Cream are very close imo. Cream has better specials overall (including an amazing SET) but Sonic is obviously faster has better basic combos.
I've always thought Shadow was kind of overrated. Sonic has much better traction so I've always preferred his running skill. His POW specials were really good and on the ground it was on par with MK's infinite cape glitch in terms of gayness. A basic 1-2-3-Heavy combo with an aim attack was usually enough to kill another player, but I'm pretty sure I've been able to get my guard up between his 3rd attack and his heavy attack.
Also, Gamma should be above Knuckles if only for his dash and the fact that he explodes when he dies. Knuckles is trash.
Sonic Battle tourneys would be amazing.
I loved Rouge's jump mechanics. She escapes several combos just because of it (ex: Shadow's heavy hit). Her drill dash attack on the ground was also an infinite against a wall, and leads into a lot of good setups, especially with her aerial homing mines.
Rouge's problem lies within her terrible follow up game after spiking someone into the ground, as well as overall terrible specials (exceptions being the spiral kick and the aerial mines), mediocre damage output, terrible guard (though it's not much a problem when you get used to its speed), and weak defenses.
I think Cream is better, because after she kills you, she pretty much restores at LEAST 25% of both health and energy before you're able to spawn back in. Sonic has a terrible heal, and they both pretty much break even in terms of damage output, defense, and setups.
Shadow's a dirty ***** too. There's a reason he's overrated.
Gamma above Knuckles?
Both of them are terrible, and can be blocked in between their combos, but Knuckles has better specials (even the Falcon Punch) that deal massive amounts of damage.
Besides, the explosion thing is only good against scrubs. That explosion is EASILY shielded, and nets the opponent around 40-60% energy for just shielding it. Too many times I've seen someone like Cream around 50% energy, KO a Gamma, shield the explosion, then OHKO him the moment he respawns because she got 100% energy from the shielding the explosion, then shield's THAT explosion for 40-50% more energy. GG, you just lost two lives and she's at the point she was at before she KO'd you the first time (a bit more since I'm sure she recovered a bit inbetween respawn times).
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PS: Eggman can't be played unless you action replay the GBA game. But Eggman is beast. His everything combos into his anything completely, while his death explosion KILLS you if you don't shield, and if you DO shield, you're gonna eat a ton of damage anyways.
Reason why Eggman isn't in Emerl's tier is because his movement is garbage, and he CAN'T ATTACK while airborne as far as I know.
@KRD: Only if the poems suck. :D