No, ‘goodest’ is not a word recognized in standard English. The correct superlative form of ‘good’ is ‘best’. While ‘goodest’ might be used informally or in playful contexts, it is not considered grammatically correct.
For example, instead of saying ‘This is the goodest cake I’ve ever had,’ you should say ‘This is the best cake I’ve ever had.’
Using ‘best’ ensures that your language adheres to standard grammar rules and is easily understood by others.