Ghost of Bisbee said:
Less obvious Easter eggs I remember seeing:
-Blue collar guy in NYC was the guy from the wrecking crew games
-Game and watch character was on a van in NYC
-Pizza place was named after the Punch Out game and also showed Mike Tyson on the wall
-Pizza place arcade cabinet was "Jump Man" which was Mario's original name
-Mario's cell phone ringtone was the GameCube startup music
-Bar in NYC was using the duck hunt duck in their logo
-Ice climber bear made an appearance
-Mario's voice actor from the games was voicing the Mario superfan
-Balloon Fight had a cameo, but can't remember if it was in NYC or the Mushroom Kingdom
-King Bob-omb, I believe King Boo, and some of the bowser assistant mini-bosses from Super Mario World were at the wedding
-Piano was named after one of the bowser assistant mini-bosses from Super Mario World
-DK chant at beginning of DK/Mario showdown came from the DK rap in the N64 game. This track was written by Grant Kirkhope, who also wrote the music for Banjo Kazooie, Goldeneye (the game), and the more recent Mario vs Rabbids games
What else did you catch?
I lol'd at the scene where someone sits down on a bench, and there's a turtle next to him, and he kind of sits on the turtle, which results in the turtle all tucked in going back and forth really fast.