Diplodocus

https://www.google.com/search?q=diplodocus+jurassic+world+the+game&rlz=1CAZGSZ_enUS936&source=lnms&tbm=isch&sa=X&ved=2ahUKEwjS_sr3t5ruAhUSV80KHWouAdIQ_AUoAXoECBMQAw&biw=1366&bih=617&safe=active&ssui=on#imgrc=rZfPsBA23H2vbMDiplodocus is unlocked by completing Battle Stage 20. Additional individuals can be purchased in the market for 750 DNA or found through card packs.