( RDS ) MySQL to MySQL migration within aws
If your instances are accessible over the net than you can simply dump the prod instance on the dev instance via the host having required utilities and access to both instances:

mysqldump --host 10.20.30.40 \
          -u myaccount1 \
          -pmypassword1 \
          --all-databases \
          --events \
          --routines  \
| mysql --host 20.30.40.50 \
        -u myaccount2 \
        -pmypassword2