Here's the picture about Bowser's three forms only on SMBHotS aka Super Mario Bros Heroes of the Stars.
The first one is Dry Bowser, when he feel into the lava, his skin melted, but his bones are still left and he's still alive. XD
Dry Bowser sprites by (c)
The second is Ice Bowser! Once he touch the Ice flower, he turns into the mightiest form to freeze his enemies!
Ice Bowser is originally as Onaga Koopa, but I use that sprite for his ice form!
Onaga Koopa was originally created by
, but he scrap it, so I use his ice form. XD
And the last one is Giga Bowser! When he face giant enemies, he transforms into Giga Bowser to defeat them.
Giga Bowser sprites was created by
, who was now