Pokmon: 13 3Ceruledge ex SVLS 6 4Charcadet SVLS 5 1Origin Forme Palkia VSTAR ASR 40 1Origin Forme Palkia V ASR 39 2Squawkabilly ex PAF 75 1Fezandipiti ex SFA 38 1Radiant Greninja ASR 46 Trainer: 29 4Carmine TWM 145 2Professor's Research PAF 87 1Boss's Orders PAL 172 1Briar SCR 132 4Ultra Ball PAF 91 3Nest Ball PAF 84 3Earthen Vessel PAR 163 3Night Stretcher SFA 61 2Pokmon Catcher SVI 187 1Pal Pad SVI 182 1Pokgear 3.0 SVI 186 1Buddy-Buddy Poffin TEF 144 1Perfect Mixer SVLS 14 2PokStop PGO 68 Energy: 18 12Fire Energy SVE 10 6Water Energy SVE 11 I love matching my decks with the same color of Sidewinder, and with Ceruledge ex / Origin Forme Palkia VSTAR, Ultimate Guard offers the perfect deck box

Heres a list of everything you can hope to open in this slot: Cavern Whisperer $0.99 Cloudpiercer $0.99 Dreamtail Heron $0.99 Migratory Greathorn $0.99 Vulpikeet $0.99 Archipelagore $0.99 Auspicious Starrix $0.99 Boneyard Lurker $0.99 Chittering Harvester $0.99 Huntmaster Liger $0.99 Insatiable Hemophage $0.99 Majestic Auricorn $0.99 Porcuparrot $0.99 Regal Leosaur $0.99 Trumpeting Gnarr $0.99 Glowstone Recluse $1.49 Necropanther $1.49 Lore Drakkis $1.99 Parcelbeast $1.99 Yeah, theres not much more to say about these cards, unfortunately
If you want to make this more balanced, I would suggest removing the ability to overlap any Rank 4 on its own, so that a "Rank-Up" Spell card is necessary.
The momentum is strong and accelerating with the 30th anniversary
It also has no retreat cost, meaning if things are getting hairy, Starmie can eject itself from the field without needing to get set back up with Energy
A perfect example of this is the highly popular Phyrexian Arena