Axel Tennyson is the Dimension 6 counterpart of Ben Tennyson in BTDW.
Origin
Axel has the same history as Regular Ben, only in the Secret of the Omnitrix saga, Gwen did not survive. He felt it was his fault, and became hardened by it, even until this age.
Omnitrix
He weilds the Delta Omnitrix, which is the Dimension 6 equivalent of the Omnitrix MIII
Appearances
Ben 10: Dimensional Warriors
Gallery
Axel as Dinosmash
Axel as Bird of Fight
Axel as Cannonroll
Axel as Polarscale
Axel as Jellyshock
Axel as Frostmoth