Tee Public is once again running a giant sale on pony shirts, sweaters, posters, cell phone cases, and whatever else you want in 3000 something designs. They also added a new official artist, who's designs you can see part of up above. There are a bunch more to go with those. Have some links:
Zodiac Pony Shirts
New pony shirts
Most popular pony shirts
In other news, does someone want to ponify the Team Mystic, Valor, and Instinct shirts? I could use some Mystic here. My Pokemon power level is lacking compared to my pony one. They could use a combine!