It was only sold at the Pokemon Centers in Japan, in December, 2024, for a very limited time and in very limited quantity
In the case of these decks, I can see the dead weight in the form of 2x Stonjourner in the Single Strike deck and 3x Falinks for Rapid Strike while the 2-3 month bit is in form of Inteleon CREs absence (Umbreon V/VMAX also counts but expecting two V/VMAX lines in a product like this is just wishful thinking)
Baltoy's presence in Generation III also ties it closely to the advancements in game mechanics introduced during this era, such as the Double Battle format and the more intricate weather systems
Well of Lost DreamsWell of Lost Dreams and Dawn of HopeDawn of Hope are similar cards that potentially offer more cards, but having to pay mana into them can get in the way of casting the spells you need
The other less advantageous card, gets sent away, and even if it was your alternate wincon, at least it's still in your deck