What is the high score for pogo sticking for a 9 year old?

Nobody (except, possibly, 9 year olds) cares. Trying to keep track of records based on the party's age or other criteria gets silly quickly ("record by a 7 years, 9 months old black girl with braces wearing a red dress").

The overall record for pogo jumps is currently 186,152 jumps over a period of about 20 hours (with 1 five-minute break allowed per hour). The record for continuous jumping is just over 70,000 over a period of about 10 hours.

My brother has made 426 jumps continuous