This is called the "Valentines Love Gang" tee.
And it's odd. Like, why would this get made? Valentines isn't a holiday that's really a 'dress up for' with themes, is it? It also does the odd/often criticized thing of trivial-altering-stock art which is often a fake or bootleg tactic. Here, it's the real deal though because the Sega Shop for 2019 Valentines has made this tee.
It has the classic logo with neo-classic stock art that has all been altered to have a love theme. Knuckles has a box of chocolate copy/pasted over his fist, the Tails is the genuine one where he's dressed as cupid shooting a heart arrow, Sonic is winking and has a boquet of roses over his hands and Amy has flowers too. But look where Amy's & Tails' hands cross above everyone, it's confusing & difficult to tell what's going on. There are some rings scattering from Sonic as well. Or is it Knuckles who is holding the roses, & sonic with rings? It isn't terrible, it is unique, and it's 26 dollars in the Sega Shop.