MnSG
Cosmic Beauty
It looks like I've made a mistake with the amount of hits that Bowser must take to be defeated.
It turns out that Giant Bowser has to take 40 hits to be defeated, but giant shells will deal 2x more damage to Bowser than normal shells. As for normal Bowser, he can take up to 20 hits.
I don't know how much damage that Bob-ombs will deal to Bowser, however, as I have yet to see Bowser get defeated by Bob-omb attacks.
It turns out that Giant Bowser has to take 40 hits to be defeated, but giant shells will deal 2x more damage to Bowser than normal shells. As for normal Bowser, he can take up to 20 hits.
I don't know how much damage that Bob-ombs will deal to Bowser, however, as I have yet to see Bowser get defeated by Bob-omb attacks.