Obviously includes spoilers..

had to include the battle as well. wanted to edit it out but couldn't since my editing programs were giving me problems..not like it took long anyway lol

How to obtain:
-Be on a second cycle
-Clear stage 10-6 with a lvl500+ Valvatorez alone

the final battle will be different once you do.

WARNING
-Once you start this ending path once the game ends it'll automatically drag you on a new cycle. This ending DOES NOT lead to post game.