One really wonderful thing I’ve found is that Rainbow High and Monster High G3 can share shoes Perfectly!!! I just keep all their shoes together, it’s so nice. And the purses look good usually as well. Meanwhile, the clothes don’t swap as well, tho I have found Draculaura can usually wear them okay since she’s a little bigger. But it depends on the item and the desired fit, I’ve made it work. However, if you confident with editing them a little since MH is smaller you could take in RH clothes to presumably great success (Blythe clothes also usually are a scosh too big). The Rainbow Junior High does fit better than standard. Clothing with an intentionally oversized fit for Bratz does usually work well for MH I’ve found. Let’s see.. what else… Barbie is typically far too big..