Games like PiyoShogi

If you finished PiyoShogi, the closest matches are Sānguó Shā Online, 4-nin Shogi, Sekai Saikyou Ginsei Shogi: Fuuun Ryouko Raiden, Simple 1500 Series Vol. 2: The Shogi and Ginsei Shogi Portable: Silver Star Japan Ginsei Shogi Series. All 10 share its card & board game genre and are ranked by how closely their themes and modes overlap.