I finished all chapter of 9th birhday, and should be 122 pixel's shields to collect, but I found only 90 could you explain what's up?
Kaprys Did all the challenges as well? The total count includes shields from there.
If you already have completed all tiles in all mines as well as challenges, you might have spent some of the obtained shields, maybe unknowingly.
Kaprys
There are 78 Shields in the Story mines.
There are 44 Shields in the Challenge mines.
There are 5 Shields available as free gifts through Diggys Facebook page.
Have you checked out the relevant Wiki pages, quests, maps, videos, guides, walkthroughs & hidden gifts
The Wiki pages & this forum will become your best friends throughout your Diggys Adventure journey.
Walkthrough articles https://forum.pixelfederation.com/diggysadventure/d/189653-9th-birthday-walkthrough-articles
Wiki page https://wiki.diggysadventure.com/index.php?title=Diggy%27s_9th_Birthday
MAPS https://drive.google.com/drive/folders/19ZjEa_W7zSyZ82Y3Q7Df6rb_V_vbpRfG
VIDEO - PC https://bit.ly/9th-birthday-event
VIDEO - Mobile https://bit.ly/9th-birthday-diggy
Fan based websites https://forum.pixelfederation.com/diggysadventure/d/189651-9th-birthday-maps-videos-hidden-bonuses-information-more
https://forum.pixelfederation.com/diggysadventure/d/189677-9th-birthday-videos-maps-energy-cost-details-pcmobile