I'm trying to be as accurate as I can with my placements, so I haven't gotten past Waluigi at the time of me typing this. I'll be sure to be done once Saturday rolls around, but I can only say so much as of now. So far, Bowser has a fantastic matchup against Waluigi. Mostly because of how slow and clunky Waluigi's moves are. It's not unloseable, but Bowser certainly has an easier time beating Wah. I realize the CPU Waluigi is unable to recover, so most of my research was based on playing Waluigi myself. His aerial down specials are all effectively useless due to none of them killing at reasonable percentages. The tekken-esque combos with Down special are high risk, low reward moves. mostly due to them having a strict timing. His best moves are dair, dthrow, and down smash, which can slide on the ground. I'll go into more detail later, but I feel that Bowser has a really easy time beating Wah.