Dolphin Wave Launches Melonbooks Collaboration With Exclusive Characters and Boss Battles

Dolphin Wave has launched a new collaboration with Japanese retailer Melonbooks, introducing limited-time characters, boss battles, vehicle decorations and login rewards. The event began on October 9 and continues through October 20, with several activities designed around the retailer's distinctive branding. A special guaranteed recruitment opportunity features Michiru Tojo in a Melonbooks-themed costume, while a separate boss battle event allows players to obtain Kohari Sakimiya wearing a Melon-chan outfit.

The collaboration also introduces a special machine wrapping called W-MelonUMI, which can be earned through event participation. Players logging in between October 10 and October 20 can collect additional Marine Stones, providing another incentive to return during the promotional period. A related pop-up store has opened at Melonbooks Akihabara Store No. 1, connecting the digital event with physical merchandise and the release of Dolphin Wave's second official art book.

The collaboration demonstrates a particularly Japanese approach to mobile-game promotion, where partnerships with specialist retailers and character-focused merchandise can create additional value for dedicated communities. Dolphin Wave already combines competitive jet-battle gameplay with extensive character collection, making limited costumes and themed equipment natural promotional additions.

However, players should distinguish between rewards earned through gameplay and the guaranteed recruitment opportunity, which requires paid currency. The event is primarily aimed at the Japanese audience, but it offers an interesting example of how regional mobile publishers integrate games, retail and merchandise. Apparently even competitive water sports are now an appropriate setting for elaborate bookstore promotions.