So in Budokai 2 Super Buu can absorb several characters, including Vegeta. Whichever character he absorbs, his voice also changes to sound like them. What's curious is that when he absorbs Vegeta, he actually sounds a lot more like Brian Drummond than Chris Sabat. And bear in mind that by this point (2003), Sabat had stopped impersonating Drummond, including in the game itself.
Go to 2:39 to hear Buugeta do a Final Flash in Budokai 2.
https://www.youtube.com/watch?v=OZqfP2Ib6w8
And on a side note, I've always thought that the fight announcer from the Budokai games sort of sounds like Peter Kelamis. Go to 3:42 to hear him.
https://www.youtube.com/watch?v=u7LMWprmdBM
Justin Cooks Drummond impression in Budokai 2
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