Also, I define the GX era to begin with the release of Cybernetic Revolution which contained Cyber Dragon, though there are varying opinions on when GX started
If you have access to a Squire, you can set Emperor this way and have Squire flip it to summon more Penguins from the deck and make your end board monsters, or if you've already played an Emperor and have a Squire, you can summon a Puny Penguin and make Kanzashi, Rikka Queen using your two synchros, and after tributing your Emperor again, you can summon one of the materials to flood the board with bigger monsters and floaters, creating quite the intimidating board for your opponent to contend against
Tibalt wants to learn about the World Tree for some nefarious purpose and is trying to use Valki's identity to do so
Replacement One: Poke Pad The common trainer that was once $8 due to its early scarcity and immediate playability, Poke Pad is the clear replacement for Nest Ball
The overconfident Synchro duelist "Yugo" from the Synchro dimension, who has a similar background with Yusei in Yu-Gi-Oh
One Energy is 1 damage based on this card