Is this Pokemon Pearl real?

[/3ds]

Bought this locally from fb marketplace in Australia. It looked good to me at first but now I'm doubting its authenticity since the rival names aren't what they should be (diamond rival names for reference) and also the notch on the top is wider than all my other games.
Front: https://i.imgur.com/zm69ixY.jpg Back: https://i.imgur.com/hxGlIhH.jpg Top: https://i.imgur.com/H3dR46v.jpg Top Pearl/Black: https://i.imgur.com/mZD4FSz.jpg Rival names (P): https://i.imgur.com/uXLK96H.jpg Rival names (D): https://i.imgur.com/EWXOKBM.jpg
Apologies if formatting is wrong, it's my first time posting with images.

submitted by /u/im_Evan_Almighty
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