The Pokémon Abyss Eye Booster Box is a Japanese-language Pokémon TCG booster box from the Mega Evolution era. Known by the Japanese set code M5, Abyss Eye has a dark and mysterious theme with Mega Darkrai ex as one of the central Pokémon of the expansion. The set also features additional Mega Evolution Pokémon ex alongside a selection of regular Pokémon, Trainer cards and collectible higher-rarity cards.

Each Abyss Eye Booster Box contains 30 Japanese booster packs, with 5 Pokémon cards included in every booster pack. A complete booster box therefore contains 150 cards distributed across the 30 individual packs. This follows the familiar Japanese booster box format, providing a larger number of smaller packs compared with most English-language Pokémon TCG booster products.

Abyss Eye includes Pokémon such as Mega Darkrai ex, Mega Zeraora ex, Mega Chandelure ex and Mega Excadrill ex. The expansion contains different card rarities and artwork styles, including Art Rares, Super Rares, Special Art Rares and other higher-rarity cards. Its darker visual theme gives the set its own recognizable character within the modern Mega Evolution era.

All cards inside the Abyss Eye Booster Box are printed in Japanese. With 30 booster packs and 5 cards per pack, the box provides the traditional Japanese opening format while offering cards exclusively from the Abyss Eye expansion. Booster contents are randomized, meaning specific individual cards are not guaranteed. The combination of Japanese printing, Mega Evolution Pokémon and the dark theme surrounding Mega Darkrai gives Abyss Eye a distinctive identity as a sealed Pokémon TCG release.