For your first TC, I think you did a kinda good job on it, to say the least. The transparent league badge chip is thoughtful, and it adds touch to the TC. Points you need to improve on:
1. On Blaziken's right side, part of it's hair/body(?) is coming out of the box. If you look, none of the other pokemon's body fold over [on the right side]
2. At the top chip, where it says Chronic, Walrein's head is folded under so much that it's eye is covered. On the same scale as the Tyranitar, it's body is out of it's box too much. It makes it look a little scrappy...