He was in a great show. He had a great show; he died in a great game.
Aqua Dude was sitting watching TV until Fusions came down to his undersea home, attacked him, and killed him. Three days later, the Heroes found him and buried him at Eternal Meadows. In the "Aqua Dead" mission, the player receives a message from Bling Bling Boy to retrieve a stone from Aqua Dude's grave so that the researchers in DexLabs can make an Aqua Dude Nano. When players complete the mission, they can find the Aqua Dude Nano in development there.