In episode 39 of Gachi Valt watches Delta create Master Diabolos,the evolution of Venom/Erase Diabolos (destroyed by Arthur Percival in episode 34),the same way…
Beyblade Burst Evolution Episode 39|Emperor of the Underground!|Beyblade Burst Rivals|Part-2| - YouTube
Beyblade Burst Surge: Season 2, Episode 39 - Rotten Tomatoes