Gigantamax Venusaur

The current apex of the Grass Dynamax meta, and the ultimate counter to Gigantamax Blastoise as of right now, Gigantamax Venusaur outclasses all other Grass Type Dynamax Pokemon currently available despite its lower Attack stat by virtue of its Gigantamax Move. however, its damage isn't massively different from Dynamax Rillaboom. Gigantamax Venusaur's G-Max Vine Lash is about 28% stronger than Dynamax Rillaboom's Max Overgrowth at max power, but Rillaboom has about 20% more Attack than Venusaur. The biggest selling point for Venusaur is its access to Vine Whip, which is a 0.5 second Fast Attack and can charge up the Max Meter more quickly than Rillaboom's Razor Leaf.

That said, Gigantamax Venusaur, much like its basic and Mega formes, is destined to fall to the wayside. It has Grass Type competition in the Dynamax meta, with the biggest threat most likely being, once again, Rilaboom's own Gigantamax forme. This fact makes Gigantamax Venusaur a powerful option, but also one that will fall off a bit in the future, so invest accordingly!

In PvP, Gigantamax Venusaur is effectively no different from a normal Venusaur, except without access to Return as a move option.