ALLOSAURUS RIDER Allosaurus Rider was a largely forgotten card from Coldsnap a card considerably worse than, say, Fury of the Horde, from the same cycle until Neoform was printed in War of the Spark
Notably, those decks don't even have to be dragon-based to get serious value from Two-Headed Hellkite, since any deck would benefit from having a huge flying beater that draws cards generously
+6/+6 is huge and can kill out of nowhere in an infect deck
Step-Up Battles have four different levels: Beginner, Intermediate, Advanced, and Expert
The key detail: the top-right of the Poke Ball features multiple blue shades blending together
Once you know what kind of Pokmon deck you want to build, you can start narrowing down your card options: You have to consider what types of Pokmon you will use in advance