Tetris is hardly Nintendo. It was released on June 6 of 1984 by Alexey Pajitnov Vladimir Pokhilko for the Soviet terminal computer Electronika 60. It has been released in a myriad of ways, shapes, and forms, on systems by Sega, Atari, Microsoft, and Sony, on the PC and Mac, and as an arcade game. Yet we inducted Hard Drop Tetris Wiki as a member of the NIWA at the beginning of last year because some of its most memorable iterations were released on Nintendo systems, most notably the version that came as a pack-in with the original Game Boy handheld.
The Ace Attorney series saw its start on the Game Boy Advance, with a trilogy exclusive to Japan that was released from 2001 to 2004. Starting in 2005, the trilogy was ported to the Nintendo DS and saw its release internationally. The trilogy was met with a sequel, Apollo Justice: Ace Attorney, that was released in 2007 exclusively for the Nintendo DS. Following Apollo Justice, a spinoff game featuring the main antagonist of the first game was released in 2009 exclusively for the Nintendo DS titled Ace Attorney Investigations: Miles Edgeworth. It later received a sequel, once again for the Nintendo DS, but it was never officially released outside of Japan.
Following the release of the Nintendo 3DS, the fifth entry in the main series was released, titled Phoenix Wright: Ace Attorney - Dual Destinies. A crossover game with Professor Layton and a remake of the entire trilogy in the form of one title were also released for the 3DS. Phoenix Wright will also make an appearance in the upcoming crossover game Project X Zone 2, also for the Nintendo 3DS.
The original trilogy has also been ported to the Nintendo Wii, iOS, and PC, though only the first game was released on the PC, and exclusively in Japan. Dual Destinies was ported to iOS as well. Phoenix Wright has never seen the light of day on any gaming console or handheld not created by Nintendo, save for his appearance as a playable character in Ultimate Marvel Vs. Capcom 3, which was released on the Playstation 3, Playstation Vita, and Xbox 360.
So you mean to tell me that Ace Attorney is not a Nintendo franchise because of a couple hastily-made ports and an appearance in a fighting game?