The difference here is you get a copy also attacking whomever you are already attacking with the Siegetbreaker, and the creature itself has haste and deathtouch to get you immediate value both on swing and if it gets blocked
There are still a couple upgrades we can do to make the deck better
There are some Trainer cards specifically suited to Grass Pokmon and Energy, for example, offering up great synergy
Rydia lets you disregard mana pips since it only cares that you pay
He depicts the world of Pokemon as a companionship between people and Pokemon
It's full of synergies with Brenard across all types, including Golem, Food, token, and artifact, creating a deck with a complex flavor