Legend of the Two Towers...

Long ago, there once was two towers, housing two powerful Pokemon... But one day, one of the towers became engulfed in flames, and three nameless Pokemon perished... However, the phoenix of seven colors appeared, and resurrected the three Pokemon... Now, the bird flies through the lands, seeking one who is worthy of seeing it... One of pure heart.
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Credit:

The stage was made by Lensho, (not that you can really see it, but Ho-Oh is apart of it), get it here.
[link]

Sephiroth PSA made by Hollow, get it here.
[link]

(His final smash is how I got this.)