Nintendo of Europe announced that some new Nintendo 3DS Pokémon Themes will be released on Friday, May 30th, 2015. Three themes were revealed: a Pokémon Shuffle theme, an Eevee and evolutions theme and a Mega Charizard X theme. Themes cost £1.79/€1.99/200yen each.

These #Pokemon Home menu themes arrive this Friday. Which is your favourite? pic.twitter.com/H7GUbOtLxq

— Nintendo of Europe (@NintendoEurope) May 25, 2015

Pokémon Shuffle (ポケとる)

Features: A cute theme based on the puzzle game Pokémon Shuffle. When users slide the bottom screen, the Pokémon change.
Music: Dancing in the Soft Breeze (そよ風に踊る)

Pokémon Mega Charizard X (ポケモンメガリザードンX)

Features: Mega Lizardon X appears on screen wrapped in explosive flames. When users slide the bottom screen, Lizardon changes to a picture of it flying in the sky.
Music: Pocket Monsters X and Y: Gym (ポケットモンスター Ｘ・Ｙ「～ジム～」)

Pokémon Eevee Collection (ポケモンイーブイコレクション)

Features: Eevee and its 8 evolutions are featured in this theme.
Music: Pocket Monsters X and Y: Trainer Promo Studio (ポケットモンスター Ｘ・Ｙ「～トレーナープロモ スタジオ～」)

Sources: http://www.nintendo.co.jp/3ds/theme/list/01210/index.html, http://www.nintendo.co.jp/3ds/theme/list/01208/index.html, http://www.nintendo.co.jp/3ds/theme/list/01209/index.html,