- Alternate Company Equivalent: Koei later collaborated with Level-5 on the Japan-only Yo-kai Three Kingdoms, a similar crossover of Nobunaga's Ambition's brother series Romance of the Three Kingdoms and Pokémon rival Yo-Kai Watch.
- Cowboy BeBop at His Computer: The official site for Pokémon Conquest gets a few details wrong, especially concerning the names of some nations. For example, Aurora gets called Primus, and Greenleaf gets called both Arbora and Sylvan. This may be the result of localized names being changed and the website's usage being left and forgotten.
- Marth Debuted in "Smash Bros.": Many Westerners confuse the half of the crossover providing the Sengoku Period motifs with Samurai Warriors instead of Nobunaga's Ambition. Given that Koei owns both franchises and reuses most of its art and characterization between the two, it's actually a reasonable guess.
- What Could Have Been: Based on the Dummied Out contents, there are a few examples.
- A Moltres is supposed to be present in the game (possibly as Mitsuhide's Perfect Link partner, judging by the alpha title screen).
- Growlithe was planned to be added at one point in development, but the only things left of it are Dummied Out sprites.
- If this game had never existed, we might have gotten a Fire Emblem and Pokémon crossover instead of Tokyo Mirage Sessions ♯FE, because Pokémon was Intelligent Systems' first choice, and they were turned down because this game already existed.
Trivia / Pokémon Conquest