Here is some fanart of a game called High Seas Havoc where you play as a seal named Havoc and take on evil pirates. It's honestly a fun little game on the Sega Genesis. Though there is one fight in this game that is extremely hard. That is the fight with Wolfenhiemer. He's not easy to hit and has so many attacks that are super hard to avoid. He's still a cool looking boss though.

Havoc and Wolfenhiemer © Data East
Art ©  torquethefox