Wow, that's a nice collection. The Diamond Pegasus is one of my favorite monsters (which may or may not be because it has the characteristics of a pony *ahem*)! The rare monsters can be challenging, but they make your Island look special and unique. They require some patience and persistence, but not everyone has these elite monsters, so keep trying!
Sorry to hear you haven't gotten one yet. Good luck in your future attempts.
Same with me, no luck so far, i hv spent loads of gems in monster to faster breeding period and still no luck so i'm kinda giving up, stuck at level 30 is boring too. I just started dragon story, i hope i have better luck there...or not..at all 😭
I have 4 too.... But I must say I do buy gold to speed up breeding so I guess that may have helped me quite a bit i think it's mainly luck... I have got mine with palmwing + sea buffalo, leaf lion + wavewing , medusasaur+ Phoenix and shellwing+ burn back lizard so there's lots of possibilities!
I was actually gonna delete the game( bought no gold),when one evening I put together the usual blue buffalo/palmwing- and was shocked to see the 44 gold speed up sign!so even if u use no gold- u can get the Pegasus!