Weirdly, I think the greatest weakness Eternatus VMAX will have to overcome is that 270 damage doesnt do anything particularly interesting
You can even combine them with Tri-Brigade cards from Phantom Rage, Blazing Vortex, and Lightning Overdrive to create a cool hybrid strategy
There's quite a few abilities, so I'd recommend taking a look at the card itself, because you probably forgot at least one of its abilities like the ability to deal damage to a planeswalker when it deals combat damage to a player so be sure to keep a copy handy just in case
If you have a Fusion Monster in your field or GY: You can target 1 "Trickstar" monster in your GY
With vigilance, trample, and ward , its hard to kill and great in combat
The Pokmon card back design was in the Neo Genesis expansion set