Reinforcements from the Future was the first American made crossover, as there was no Gaoranger vs Timeranger. And was the last crossover until Thunder Storm 2 years later. And it's still one

Do you think a scarlet witch movie would have been more widely accepted as marvels first female rather than captain marvel, perhaps even over black widow : r/Marvel

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Which Power Rangers series has the best story? - Quora

Power Rangers Wild Force: Reinforcements From The Future Review – The Uncanny Fox

Discuss Everything About RangerWiki

A minor Easter egg: the opening of the new trailer mirrors the first panels from Doctor Strange's first comics appearance. : r/marvelstudios

Do you think a scarlet witch movie would have been more widely accepted as marvels first female rather than captain marvel, perhaps even over black widow : r/Marvel

Hyakujuu Sentai Gaoranger vs. Timeranger, Idea Wiki

Why are there crossovers in the Power Rangers series? - Quora