The mascot, called Trusty, was taken between 6.30pm and 9.30pm on the evening of Tuesday 16 September 2014. It was taken from outside where it was used to promote the event which took place inside.
Trusty was attached to a power supply and contained a fan which kept it inflated. It cost around £2,500.
Police are appealing to anyone who witnessed the inflatable being stolen, has come across it, or knows where it is now, to contact them, along with anyone with any other information about the incident.
PC Peter Taylforth of Harrogate Safer Neighbourhood Team, said: The inflatable is quite large and of a distinctive design. It would not be of any use to anyone other than the organisation it was intended for. Also, anyone attempting to remove it would have been visible to any passers-by. It’s possible that people who saw it being taken didn’t think anything suspicious was happening. I urge anyone who has any information about the theft, to contact the police as soon as possible.
If you wish to remain anonymous, you can pass information to Crimestoppers on 0800 555 111.
Please quote reference 12140159570 when passing on information about this incident.