I feel like this has to be a thread already, but I can't be bothered to look.
Basic genres:
Platform: 9 (Master of Darkness, Demon's Crest, MM's MQ, Shatterhand, Gunvolt, PMail, SML2, Bugaboo, 20XX)
Shooting: 6 (Parodius, Trax, The Firemen, Ranger X, Splatoon, Metal Black)
Adventure: 8 (C.Monkey, ROTH, Hoboken, Soul Blazer, IlluGa, Terranigma, Undertale, Long Live the Queen)
Puzzle: 2 (BOXBOY, Lolo)
Combat: 2 (Hebereke, Shin Nekketsu Kouha)
Generic Action: 2 (Bal Cube, Soundvoyager)
Strategy: 1 (Live-A-Live)
Racing: 1 (Wave Race)
Dimensionality:
2D: 26
3D: 3 (Wave Race, ROTH, Splatoon)
NoD: 2 (LLTQ, C.Monkey)
And by console:
SNES/SFC: 10
PC: 6
Arcade: 2
NES: 2
Sega Genesis/CD: 2
Game Boy: 2
3DS: 2
SMS: 1
GBA: 1
N64: 1
Wii U: 1
ZX Spectrum: 1