What if....the Omnitrix never recalibrated?

This is the 4th episode of Ben 10: What if....

Plot
Ben and Gwen are fighting DNAliens but Ben becomes Diamondhead and spikes them.

Diamondhead:I still got it!!!

Meanwhile at The Wrath of Vilgax.

Ben becomes Stinkfly and shoots him but Vilgax swats him.Then he becomes waybig But Vilgax tackles him.

Vilgax:Your weak Tennyson!!!

Waybig then becomes Oldiebug.

Oldiebug:Not a new alien!

Vilgax:*Laughs*

Oldiebug:WHAT???

Vilgax smashes him.Oldiebug becomes Wrestlecroc.

Wrestlecroc:I like this guy!

Vilgax smashes him.

Ben:No no no!

Vilgax kills him and takes the Omnitrix.

Major events
Oldiebug and Wrestlecroc make their debut.

Vilgax takes over Earth.

Aliens used
Diamondhead

Stinkfly

Waybig

Oldiebug

Wrestlecroc