Its obviously crazy in +1/+1 counter decks, but I wouldnt be ashamed to play it with no synergies whatsoever
Then, all your other characters can mercilessly attack your opponents characters
Once per Chain, when your opponent activates a monster effect on the field that targets a card(s) you control (Quick Effect): You can Set this card in your Spell & Trap Zone, and if you do, negate that opponent's effect, then if that monster has the highest ATK on your opponent's field, return it to the hand
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Charge only needs 1 electric Energy attached to Pikachu, while Thunderbolt needs 2 electric and 1 Energy of any type
Gain control of that creature. So it not only saves the creature but also steals it from your opponent if you regenerate it at the right time