Stompy the Dinosaur Flippable.
Sequins flip from Pink to Mauve.
 
This is the 2nd release Stompy, the first release,  in June 2018, came out with Tremor and Crunch, all in 2 sizes and were only available as a Trial in around 10 stores across the Uk.  A few of the styles have the exact same product code for both Regular and Medium sizes but the only real way to tell if you have one of the original trial pieces is by the Red Ty Heart Swingtag - The ORIGINAL ones have the 'B' in Flippables the CORRECT way around whereas the 2nd release onwards have the same "B' REVERSED.
The Original ones are super rare !