This was the last thing I saw coming. Honestly though, I always thought Game Freak was straight-up owned by Nintendo, and seeing one of their games not only arrive on competing consoles, but not even be on their's is just really really weird.
Will definitely give it a look when it comes to Steam though. I always suck at 2D platformers but I'm a sucker for hand-drawn sprites like what seems to be here.
Also, Aki-kat, I'm curious where you found out how Sonic Adventure and NiGHTS did poorly. I thought Sega didn't publish sales info for digital titles?