Ultimate Mecha-Bowser's full-body appearance.
Ultimate Mecha-Bowser is one of the "currently in-progress" robots made for total destruction of Happy Tree Kingdom and building a replacement of it while turning the tree friends into slaves in the process.
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The first phase of the battle against this boss as seen in HTFA 6.
Bowser showing up in the second phase of the final battle in HTFA 6. The head part of the mech can be separated from its body to function as a mini-battleship.