Your yoshiness level is how similar you are to Yoshi. Having a high yoshiness level requires either looking similar or having similar attributes to Yoshi, as well as having a personality similar to Yoshi.
Yappiness (noun): A state of happiness derived from engaging in lively and extensive conversation known as Yapping. It describes the joy and contentment that come from talking a lot, often with friends or loved ones.
After spending the afternooncatching up with her friends, Jane felt a sense of yappiness, enjoying the state of being happy from yapping about their lives.