 If you liked
Mashima-en
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 ...then you might like
Toriyama Akira ○-saku Gekijou
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Both of these are one-shot anthologies made by famous shounen manga authors - authors that are famous not just for making mainly battle shounen, but specifically for mainly one of their works (Dragon Ball, Fairy Tail), so fans of those works might be interested in and surprised by the miscalaneous works that differs from what the authors are known for. Both of these collections are also named after the authors.