Well ignoring the topic of how the thread should operate,
Kirby-
Whenever you pick up a secondary, you are either playing them because you think they are fun, or because they give you an advantage because they have good match ups against characters your main is weak against. If you are picking them up for fun, you wouldn't be here, so I'll address my comments to the latter group.
Kirby is not a secondary to use. He has to aircamp against D3 to go even, and the IC's beat him. Two of Bowser's worst match ups, and he doesn't do as well as other characters. Kirby doesn't cover Bowser, and as such shouldn't be used.
Bowser has trouble with anyone who has a great grab game, because grabs ignore shields, and Bowser is an entirely shield based character. The best counter to fighting grab happy characters is to (1) to space really, really, well and never get grabbed. Or, more likely, (2) stay in the air and they can't grab you. Bowser sucks in the air, and he has a weak spot beneath him where he would need to hit them from, he fails as an aerial character, and he has tiny hitboxes so he really can't outspace them. Figure out secondaries that can cover his weaknesses. MK IS NOT THE BEST BOWSER SECONDARY. People always say MK is the best secondary, but they don't realize a secondary is to cover your bad matches, and while MK goes even or better across the board with everyone, you aren't using him across the board, only in specific matches that Bowser has difficulty in. So look at the characters Bowser has trouble with, and find who they hate. Congratulations, you found your secondaries!