>>55215638My theory is that it was the true original Primal Groudon. Even Primal Groudon and Kyogre are corruptions of their previous bigger, stronger more powerful versions.
Pokemon Special also had a bigger Kyogre through the power of Jirachi. Maybe that was the original one?
Jirachi through the fossil recreated Primal Groudon how it was originally supposed to be. Even the Primap Orb can only create a corruption of Groudon that is more stable and it's much smaller.
The energy absorbing vines are for his fight against Kyogre and other legendaries. Groudon lost its vines over the aeons.