Biodome

Speed or mallrats depending on what kind of vibe you’re going for

edit: upon reflection I will change my Sandra bullock movie to “the net”. Terrible, but strong 90s vibes

Space Jam?

Maybe it's just because my mid teens were the late 90s, but my vote would have to be for either Half Baked or American Pie.

As a counterweight to all the american movies on this thread:

https://en.m.wikipedia.org/wiki/Les_Visiteurs

Mallrats 100%, followed by the Action Park documentary

Friday 1995

Second post, but I realized the answer might actually be Teenage Mutant Ninja Turtles 2: The Secret of the Ooze.

Exhibit A

John Frankenheimer’s Ronin (1998) but not in the way you maybe mean. This movie simply has to take place when it does in the 90s. The plot just wouldn’t work otherwise.

~~Goof Troop~~ A Goofy Movie would be one of my picks. 1995, I think.

The Sandlot

Gremlins 2. Not sure any other movie quote captures the absolute cocaine fuelled Hollywood of the early 90s.

https://m.youtube.com/watch?v=x01l_jMhjVM

There's also a terrible John Leguizamo movie called The Pest, that I'm genuinely amazed didn't end his career right there. The wife was suprised I hadn't seen it, and as we started she just went "you're going to hate it".

She was not wrong.

Ninja turtles or surf ninjas

I'm saying Fern Gully.

New answer: Clerks.

True Romance

Am I the only person who watched Singles (1993)? OK, pretty forgettable romcom, but absolutely the soundtrack of the 90s.

Con Air is the most 90's movie that ever 90's its way through the 90's.

Mallrats

The Big Lebowski

The super Mario bros. Movie

Half-Baked

Speed.

Wayne's World.

Akira

Okay, it's actually 1988, but it definitely got that 90s anime feel.

Reservoir Dogs (1992)