Say, what's better than Parodius Da!? The sequel, Gokujō Parodius of course. Those in the know know that its English title is "Fantastic Journey", but I'm not one for breaking naming conventions for the sake of one game.
Gokujō Parodius comes from a time where new entries in the Gradius series were nonexistent, and so on a technical level, it stands out as being a hundred times better than the game it set out to parody. Basically that means in 1994, the best Gradius game wasn't even a Gradius game at all.