I've taken up Kirby as my secondary recently. I've been checking him in tourney matches where I can and he's won me some fights I didn't think he would. Took him to grand finals vs Silent Wolf at GG in Portland, OR last weekend.
My matchup knowledge with him isn't as extensive as my knowledge of Wario, but I'm getting very comfortable with him and I'll try and start discussing him on the boards here from time to time, seeing as there isn't a whole lot of Kirby discussion going on.
Anyone have thoughts on the G&W MU. I had no answer for the one i played in a tournament.
So, this matchup really sucks IMO. I haven't done it much, I'll sum up the exposure I've had to it.
Compare: Kirby and GW are about the same size/weight and have about the exact same size-range ratio as one another.
Contrast: GW has hella disjoints, where Kirby does not. So Kirby loses just about every trade. Kirby has multi-jumps and multiple recovery options whereas GW has a relatively linear recovery. Kirby's aerials come out faster than GW's. Kirby has super consistent defense via super armor, GW has higher kill potential on more of his moves.
Strategy: Get GW offstage and gimp him ASAP. GW has a terrible shield but an incredible OOS option. I don't think Kirby wants to spam inhale because GW can react while in shield with Up+B and be pretty safe while falling, so it's probably better to swallow GW than spit him. Bacon can neutralize bacon too, so that could help your neutral game a lot. Since Kirby's aerials come out faster than GW's, Kirby should be able to follow up off bacon very easily. Both players are going to want to stay below. Kirby's rock is a godsend but you'll have to be very careful using it. Kirby can't fall through bacon without it and GW knows it and has exactly the tool to deal with it because the bacon has no landing lag, allowing him to match Kirby's horizontal position and be ready for the rock fall and the punish. I never got a chance to really dissect throw options, but D-throw is tried and true, it always gives ya something to work with at the very least.