| Matadors from QMS 1938-016 | 1939 | | 0 | 1 |
| Matchmaker | 2008 | | 0 | 1 |
| Mathilda from Duvall College | 2009 | | 0 | 1 |
| Mathilda from Mickey 2.0 | 2022 | | 0 | 1 |
| Matias from B 870057 | 1987 | | 0 | 1 |
| Matilda Digger | 1959 | | 0 | 1 |
| Matilda the hen | 1985 | | 0 | 1 |
| Matilde and Epaminondas the lions | 1991 | | 0 | 1 |
| Matilde the hen | 1995 | | 0 | 1 |
| Matirda the hen | 1990 | | 0 | 1 |
| Matirda the jaguar | 1988 | | 0 | 1 |
| Matirde from B 880034b | 1989 | | 0 | 1 |
| Matos the guide | 1974 | | 0 | 1 |
| Matraquilda | 1985 | | 0 | 1 |
| Matrix | 2007 | | 0 | 1 |
| Matt Bluestone | 2007 | | 0 | 1 |
| Matt Hoffman | 2003 | | 0 | 1 |
| Matt Rindo | 1976 | | 0 | 1 |
| Matusa the witch | 1993 | | 0 | 1 |
| Mau Heymans | 2018 | | 0 | 1 |
| Maudie | 2016 | | 0 | 1 |
| Mauro from B 860071 | 1987 | | 0 | 1 |
| Maus | 2007 | | 0 | 1 |
| Mavala | 2025 | | 0 | 1 |
| Max Cooper | 2002 | | 0 | 1 |
| Max Fasthappen | 2023 | | 0 | 1 |
| Max Johnny | 2017 | | 0 | 1 |
| Max Topidoro | 2022 | | 0 | 1 |
| Max from TL 3620 | 2025 | | 0 | 1 |
| Max the heffalump | 2003 | | 0 | 1 |
| Maximus from I TL 2832-1P | 2010 | | 0 | 1 |
| Maxwell | 2014 | | 0 | 1 |
| Maxwell Mouse | 1953 | | 0 | 1 |
| May Bee | 1948 | | 0 | 1 |
| Mayor Hizzoner | 1942 | | 0 | 1 |
| Mayor Wong | 2024 | | 0 | 1 |
| Mayor from B 74430 | 1975 | | 0 | 1 |
| Mayor from YM 026 | 1935 | | 0 | 1 |
| Mayor of Bologna Land | 1999 | | 0 | 1 |
| Mayor of Hamelin from QMS 1933-015 | 1942 | | 0 | 1 |
| Mayoress from 29th century | 1967 | | 0 | 1 |
| Maître Astrogildo | 1989 | | 0 | 1 |
| Maître Lerequin | 2003 | | 0 | 1 |
| Maître Pierre | 1992 | | 0 | 1 |
| McBaffo | 2013 | | 0 | 1 |
| McBeagle-022 | 1967 | | 0 | 1 |
| McCabe | 2022 | | 0 | 1 |
| McFactor Mouse | 1960 | | 0 | 1 |
| McFee | 1986 | | 0 | 1 |
| McGander | 1966 | | 0 | 1 |
| McHorn | 2025 | | 0 | 1 |
| McLusky | 2023 | | 0 | 1 |
| McSnoop | 1935 | | 0 | 1 |
| Mean Dan Beagle | 1977 | | 0 | 1 |
| Mean brown dog | 1963 | | 0 | 1 |
| Mean dog from ZX 61-10-15 | 1961 | | 0 | 1 |
| Mean dog from ZX 67-03-19 | 1967 | | 0 | 1 |
| Mean dog from the beach | 1964 | | 0 | 1 |
| Mean pup | 1976 | | 0 | 1 |
| Mecha Moth | 1998 | | 0 | 1 |