They changed Doose to Bisonorus somewhat last minute because there was a teaser for Doose on the loading screen for Dawn of Fire at one point. They probably did change it because little kids would make jokes about the name and they wouldn't even let you name your Spunge Butterface in that game cause it had butt in it. Bisonorus is also just a more clever name because it combines more puns: bi (two), bison, chorus, and sonorous (a deep/booming/ sometimes echoing voice)
1:25 The second Tweedle Concept there actually has a name and that is Owlesque. The first Tweedle Concept might already be in the game as the Titan Gigacheep, Air Islands Skin and yes the fur of Owlesque was actually later reused for Rare Bowgart. The Wings for the first Tweedle were also reused for the Rare Congle although with a different color.
2:45 The Toe Jammer was also an Inspiration of Denchuhs which is bred with Toe Jammer
6:22 That one was actually finalized and teased and shown on the Loading Screen until they changed their Minds and scrapped it.
7:15 Baby Boskus was also shown like this in the DOF Demo but it eventually got scrapped because it looks like he doesnt have anything on and his finger is his-
10:13 Screemus Bio is actually describing the Process of the Monster Handlers decorating it with Paint and Ribbons because it looked so boring at first