The Pokemon Company usually goes from strength to strength the longer a generation goes on, introducing new mechanics and different card types
Mega Altaria ex can be obtained from Mega Rising: Mega Altaria pack in the Mega Rising set
Still, when people talk about the Base Set print runs, they are usually split up into four general groups: Shadowless 1st edition Shadowless non-1st edition (note that this is not an unlimited print run, because there was still only one print run with Shadowless cards lacking the 1st edition symbol) Shadowed unlimited edition 1999 Shadowed unlimited edition 1999-2000 Here are all four of them for the Base Pikachu, which are also covered in another article of mine: my Base Pikachu Artwork variations article
Battle at the Helvault rewards you for running Oblivion Ring effects
Whats great is that the included cards are, as mentioned, standard Pokmon cards
Back to the protection angle, as this is key to earning victory with this deck
