A copy of City Folk, a copy of New Leaf & Happy Home Designer, a copy of New Horizons, and two copies of Happy Home Paradise (I share the cartridge between my two Switch islands and use a family plan to maintain Online functionality).
GC: One, with 4 different towns and memory cards.
e+: One
WW: Two, one physical and one Wii U Virtual Console.
CF: Two, one for my Wii and one for my Wii U. I also have 4 or 5 different saves backed up on my computer (modded system).
NL: Four. One physical (doesn't read anymore though), two digital, and one physical Welcome Amiibo.
HHD: One.
AF: One.
NH: Two, one digital on my Switch Lite and one physical on my main Switch.
1 doubutsu no mori
1 animal crossing (gamecube)
1 wild world (is my second copy though, the first became completely unplayable due to corrosion)
1 city folk
2 new leaf (one digital, one physical)
1 happy home paradise
1 pocket camp account
1 new horizons
1 Wild World, 1 City Folk, 2 New Leaf (1 Physical 1 Digital), and 1 New Horizons (Digital). Just got the physical New Leaf and Wild World recently as I've gotten into collecting DS/3DS games more, the games look really good on a dual IPS 3DS
Just 1 copy of every AC game I’ve played - hard copy for WW, CF and NL with welcome amibo and digital for NH with HHP, plus a pocket camp account.
On the previous games I’ve never really thought of owning more then 1 copy but for NH there are times when I’ve wanted another so I could try out different ideas for my island without sacrificing my original. If I ever get another switch I’d probably grab another copy.
i've got 1 copy of city folk, 3 copies of new leaf (1 is og and the other 2 are welcome amiibo versions), 1 copy of happy home designer, 1 copy of the amiibo festival and two digital copies of new horizons! i kinda regret getting the digital copies of new horizons since i normally get the physical copies of games, but i think i there was a delay at the game shop i usually go to, and i was in such a rush to play being the impatient mess i am LOL