What makes it a fake guys?
I seem as clueless as the guy selling it
The grip is wrong, the grip tape is a tell tale sign of fakery as it is too thick. There is no grade sticker below the 'Bubble Individually Hand Crafted' sticker on the front. The shoulders are wonky. The bat cover is wrong/fake, Bubbles in the higher models came with a dark blue padded cover, the lower models did not have a cover.
Kookaburra bats are never shrink wrapped.
It appears to have a badly applied black toe guard. Kookaburra toe guards are usually either a neutral colour to match the willow or they are the core colour of the range, ie a Kahuna toe guard was often green.
Theres probably more but I only looked briefly.