IGAvania referes to, like Glowsquid said, exploration based ones also called Metroidvania. Iga stands for koji igarashi who is the developer of those games if you meant that
-Classic Castlevania is supperior to IGAvanias in every way
-I despise Splatoons Soundtrack
-Kirby had no good game since Kirby 64
-Mega Man and Bass is the best Mega Man game
Also yes first post from me Hi.