Ike maybe, but t.link is so hard to play on wifi. Do you GaW'ers really think GaW does worse on wifi?
There is a reason why he almost never places on the AiB ladder.
He sucks on wifi plain and simple. Wifi ruins the ability to space, and considering how long some of his stuff lasts, it sucks a lot to mis-space with this character. It also makes him very prone to messing up his recovery, and generally speaking makes it much harder for him to punish stuff safely. Good players on wifi STILL tech the D-throw and his Smashes don't have enough range to be easy to land. Really, only Marth is hurt more by wifi than G&W.
Toon Link is only hard to play on wifi if you're trying to play him like he's supposed to offline, but he doesn't need to. He can just throw projectiles all day, mess up, and pretty much nobody is able do anything safe about it, and he kills you stupid early with his quick Smashes/U-air.
Ike is better on wifi because F-air becomes a POKE option on wifi. I don't just mean any old poke. I mean THE BEST poke on wifi BY A LANDSLIDE. Wifi usually makes it difficult to block this attack on reaction, let alone punish it, and it's harder to time shieldgrabs when he Jabs your shield.