It’s poking at the current celebration and how dry it is. It’s an ironic joke.
The 2020 Worldwide Celebration's First Part was rather dry, with little new content to do until the Second Part came.

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Here ya go, no cactus version.

Sources: https://www.reddit.com/r/DBZDokkanBattle/comments/iqmc6h/worldwide_celebration_part_1/g4w50pk/
https://www.reddit.com/r/DBZDokkanBattle/comments/iqmc6h/worldwide_celebration_part_1/g4t182k/?context=10000