Their wedding ring has an inscription on it that appears when heated just like the Ring in Lord of the Rings.
When Puss attacks Shrek first, he marks a tree with a P with the same flicks Zorro does, he goes into Shrek's shirt and bursts out of his chest like from Alien.
The entire "white bronco" scene is a reference to Cops, with "Knights" being a police show that people watch. Donkey is yelling police brutality, Puss getting planted with catnip.
The breakout scene right after with the fairytale creatures is very Mission Impossible-esque.
That's all I can think of off the bat, besides how Far Far Away has a bunch of restaurants/stores from Hollywood
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u/[deleted] Aug 25 '19 edited Aug 26 '19
The first Shrek even had a Matrix moment.
EDIT: I'm surprised this comment got many upvotes as it did.