A original remix of Megalovania by: Tobi Fox 
Of the game "Undertale"

Page of the original game: http://undertale.com/

Megalovania - kenshisama02 Remix

Is a cover from the original movie Pokemon 2000 Lugia's song

Lugia's Song - kenshisama02 Orchestra Cover

Is a piano cover of Lugia's song in the pokemon movie 2000

A Cover From Pokemon Red and Blue (Also Green in japan) of lavender town