Dento is one of my personal favorite traveling companions; he had a fun personality with many interests and a few memorable Pokemon. However, that's not to say that there are things that could have been improved about him.
Why was he so afraid of Choroneko, anyway? Do you think his goal of wanting to pursue fishing in the end was odd? Do you think his general goal of pursing being a Sommelier was handled well? Do you think he was a good traveling companion for Satoshi?