He actually makes an appearance in Kevin 11 as a hologram. It is here: at 14:14 --Evolved To'kustar 07:30, May 11, 2011 (UTC)

Just to add to what Evolved To'kustar said: It's when Kevin is trying to crash two trains together, while Ben is searching the Omnitrix for Heatblast, right before Fourarms' hologram appears.

Blaziken rjcf 07:39, May 11, 2011 (UTC)

Nevermind. Comparing the hologram from the first episode of Ben 10 and the one here, it's obviously Diamondhead.

Blaziken 21:28, June 5, 2011 (UTC)

2.1 Updated with new information


It seems that when XLR8 is spinning one of those goons in the arcade in a whirlpool, he makes a wierd screaming sound that I apparently heard all over YouTube, especially with memes. Can someone confirm if that is true or not? If so, it should be added to Trivia.