Does Winged Kuriboh lvl 9 count as a for the use of card effect spell Multiply?

Yes, Winged Kuriboh LV9 counts as a Level 9 monster for the purpose of using the card effect spell Multiply. Multiply can be used to target any face-up monster on the field and increase its Level by 1.

Winged Kuriboh LV9 is a Level 9 monster, so it can be targeted by Multiply and its Level will be increased to 10. This will allow it to gain the effects of cards that require a Level 10 monster to be on the field, such as "XYZ Dragon Cannon".