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{{Infobox Bakugan

|first = [[Last One Standing]]

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'''Fortress''' is [[Shadow Prove]]'s [[Mechanical Bakugan]] [[Bakugan Trap|Trap]]. It takes the form of a cube like [[Zoack]], but has a more circular body when it opens (opposed to Zoack's more square form).

*In ''[[Bakugan Dimensions]]'', its Special Ability's artwork featured [[Fourtress]]'s artwork instead of its own.

*Fortress is the only Bakugan Trap in anime to be shown in multiple attributes.

*In ''[[Bakugan: Defenders of the Core]]'', it was the most used Trap Bakugan.