Blanksie's Beauties to Peter Punk

Nancy Blansky of Blansky's Beauties was the cousin of Happy Days? Howard Cunningham.

Perfect Strangers' featured a game show segment in which the toilet was provided courtesy of Cunningham Hardware in Milwalkee, WI, owned by Howard Cunningham of Happy Days.

Family Matters was a spin-off of the character of Hariette and Carl Winslow from Perfect Strangers

The family from Step by Step was in the middle of a barbeque outside when Urkel from Family Matters came (literally) crashing in on the jetpack he had built on the last episode of Family Matters.

Boy Meets World and Step by Step both had episodes at Disney World and whiel in Disney World Eric from Boy Meets World met Dana from Step by Step.

Boy Meets World was continued decades later in Girl Meets World

Austin and Ally appear on an episode of Girl Meets World. Bringing the Disney Channel Live Action Universe into the Westphall Universe

Jessie and Austin & Ally crossed over

Good Luck Charlie crossed over with Jessie

At the end of the episode "Guess Who's a Cheater", Stan says "Good Luck, Charlie", just as Teddy Duncan does on that show

In the episode "Cat with a Blog", the band Metal Wolf from I'm In The Band is referenced.

Burger from I"m In The Band nearly runs someone over, yelling "Skateboard on the sidewalk, Zeke!", in reference to Zeke and Luther

Peter Punk crossedover with Zeke and Luther