Almost every set has alternate frames with unique styles and art for the marquee cards, and the bonus sheets also get multiple art variations
If Opportunistic Dragon leaves the battlefield before its triggered ability resolves, your opponent keeps control of their Human or artifact, it doesn't lose any abilities, and it can still attack or block as normal
While both games use some overlapping mechanics, certain abilities and attacks from the Pokmon TCG can't cross over into Pokmon TCG Pocket
Cloud, Midgar Mercenary is one of the best since it comes with an equipment tutor, but Strionic Resonator, Felix Five-Boots, and Echoes of Eternity are all ways to get even more from your best equipment
It really is as strong as people think it is