The Pokémon Company has released the
Pokémon: Ditto (動くメタモン。へんしん不要。) LINE set on April 4th, 2023 for 250 yen (including tax) or 100 LINE Coins. Ditto now has a sticker set all its own! Ditto is great at using Transform, but in this set, you can see it without any disguise, chilling and living its everyday life. You can use these stickers as emotes when chatting with friends!
Sources:
https://line.me/S/sticker/28292 and
https://www.pokemon.co.jp/goods/2023/04/230407_ph01.html