(Click to enlarge.)

Merco is one of the three members of the Beastector, the primary antagonists from the Nintendo 64 game Mischief Makers. He's the last of the minibosses confronted in the course of the game. Merco wears a suit of armor and wields a large lance, however in his second form he pilots the mech "Phoenix Gamma".

Merco has virtually no fanart. He has zero hits on e621 and R34. When I looked for fan art from others to use as a reference, because there is exceedingly few pieces of official art of him, I found literally only two drawings from other artists done well over a decade ago. He has always been a favorite character of mine though because I guess I saw him as a "male" version of Kazooie or something, I don't know. Mischief Makers was a decent game, certainly overlooked, and I feel like the game's status as a sleeper title likely had an effect on Merco being lost to time.

His character model changes in the actual game because if you look up pictures of him in his suit of armor it does the Star Fox thing where his legs get really thin and strange only when he is in the suit, so I had to take some creative liberties with his armor to sort of "invent" the way it might look without changing the actual shape of his body.

Here's what I believe is he first piece of Merco art in well over 10 years, and the first piece of "rule 34" art as well.