Seviper collection: unlimited edition Japanese World Champions Pack Seviper and Battle Frontier are the last two cards I need to fully complete it.
Moltres WotC #21 Promo variations collection: Australian Game Boy Color sealed English promo and both 1st and unlimited edition Japanese Web booster packs are the last three sealed variations I need to complete my collection.
English & Japanese exclusive Full Art Supporters collection: this collection is complete for now, until the new English set will be released. 
Pikachu collection: from the officially produced Pikachu cards (so excluding misprints, sample prints, etc.), I still need: 2 English cards; 10 Japanese cards; 5 German cards; 2 French cards; 2 Italian cards; 6 Spanish cards; 9 Korean cards; 0 Dutch, Portuguese, Chinese, Polish, Russian, Thai, or Indonesian cards).
National Index including all Forms & Shiny Pokémon: Will start buying the gen 8 Pokémon soon, but apart from those new Pokémon and Galarian & Gigantamax forms it’s complete.
Yu-Gi-Oh rarities (including OCG/misprints): Still need a couple of misprints, like an Ultimate Rare with Rare silver name; a Gold Rare with silver Rare name; a couple of No Name errors; an Ultimate Rare v2+ without holo image; etc.
Greetz,
Quuador