樱国之魂 Samurai Evolution - Oukoku Geist

In Samurai Evolution: Oukoku Geist, a futuristic 'Cherry Blossom Kingdom' named Oukoku, players assume the role of sibling protagonists Honda Masamune or Honda Kaguya and participate in the national obsession of Astral Duels using EX (Exceed) partners. The gameplay features Pokémon-like recruitment where player characters transform EX creatures into weapons such as hammers, tridents, axes, claws, and swords, each with elemental affinities (earth, wind, fire, water, love) and alignments (black or white) that dictate battle strengths. Battles occur in a side-scrolling format where the player directs attacks, including up to six memorized songs for status effects, scanning, or healing, plus powerful combo attacks via a gauge system; party members gain levels and skills through attrition-based fights emphasizing high HP and elemental matching. The story follows the siblings' quest to rescue the abducted girl Sakura from the schemes of a fortune-teller named Akira, involving national history, duels, and personal bonds. Characters include the playable Honda siblings (whose choice has minimal impact), EX partners (humanoid NPCs that can also become weapons), and supporting figures in the Cherry Blossom Kingdom. What makes it stand out is the inventive battle system blending action, elementals, and songs with a quirky sci-fi samurai aesthetic featuring genetically modified cherry trees as supercomputers.