Collection of several short stories, including omake (extra) koma stories, published as an anthology. The stories are often very slapstick. 
(Source: Wikipedia)

Manga series focused on Shadow The Hedgehog in order to promote Sonic X Shadow Generations. 
Shadow and Maria live on the Space Colony ARK, but one day they are suddenly attacked by the Earth Defense Forces who are “disposing of dangerous biological experiments”. Shadow and Maria try to protect each other, but Maria is hit by a merciless bullet…? 
(Source: Shogakukan)

A manga booklet given out to Japanese movie attendees for Sonic the Hedgehog 3.

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