Here are some commercials that aired primarily during Beast Wars: Transformers, Sailor Moon (The s**tty DiC dub) and The New Batman/Superman Adventures -

1. Got Milk?
2. A Bug's Life Toys
3. Kids' WB 50 Toons promo
4. Toys 'R' Us
5. Street Sharks end credits
6. DiC Entertainment/BKN (1998)
7. Beast Wars: Transformers WB 50 promo
8. WBDC-TV Kids WB 50 Station ID (1998)
9. 'Beast Wars' will be right back!
10. McDonald's (A Bug's Life)
11. Tiger's Light Wars
12. Honey Nut Cheerios
13. Pokemon Ball Blasters
14. Hercules: The Legendary Journeys & Xena: Warrior Princess WB 50 promos
15. Beast Wars: Transformers bumper
16. (same as #9)
17. Don't Wake Daddy!
18. McDonald's (Play-Doh)
19. You Don't Know Jack! Trivia Party Game
20. Disney's DuckTales syndicated promo (Weekdays at 6:00am on Washington's WB 50!)
21. (same as #1)
22. Boy Meets World syndicated promo (Monday at 6:30pm on Washington's WB 50!)
23. (same as #15 & #9)
24. Pokemon Pikachu
25. Sister, Sister & Smart Guy The WB promos
26. Electronic Hot-Shot Basketball
27. Ouija (God, this f**king Game...)
28. Malibu, CA. WB 50 promo
29. Mummies Alive! WB 50 promo
30. (same as #9)
31. Beast Wars: Transformers end credits
32. WBDC-TV Kids WB 50 Station ID #2 (1998)
33. Wars Planets Intro (partial)
34. Kids for Less (partial)
35. Bananas in Pajamas end credits
36. Sachs Family Entertainment (1998)
37. WBDC-TV Kids WB 50 Station ID #3 (1998)
38. The New Batman/Superman Adventures Kids' WB promo
39. Kids WB's Dubba-Dubba Kids promo
40. Furby!
41. (same as #7)
42. And now, more 'Sailor Moon'!
43. RoboCop: Alpha Commando WB 50 promo
44. (same as #42)
45. 'Sailor Moon' will be right back!
46. (same as #29, #40, #12, #42, #43, #28 & #13)
47. Tiger's Lazer Tag Blast/Stinger
48. Santa Claus: The Movie WB 50 promo
49. The Rugrats Movie TV trailer
50. Animaniacs WB 50 promo
51. Sailor Moon end credits
52. DiC Entertainment/Seagull Entertainment (1995)
53. WB 50 E/I bumper
54. Silly Slammers
55. Don't Go Away! 'Monkey Magic' will be right back!
56. Battle Squads
57. (same as #3)
58. Cookie Crisp Cereal
59. (same as #29)
60. Monkey Magic end credits
61. The Sachs Entertainment Group (1998)
62. (same as #32)
63. Hot Wheels Volcano Blowout Set
64. Mighty Joe Young TV trailer
65. Nintendo Game Boy Color
66. Kids' WB's Happy Holidays Message
67. Batman Beyond Kids' WB promo

Video footage courtesy of TheLiteShines at archive.org
All credit of this footage goes to him!